Description M5Stack UHF RFID Unit (JRD-4035) is an ultra-high frequency embedded wireless RF read/write module for tag detection and data reading. This UHF RFID reader uses the JRD-4035 module solution with a built-in ceramic antenna, reducing the integration uncertainty that can come from adding an external antenna to ordinary UHF modules. With optimized RF design, the JRD-4035 RFID Unit is built for low power consumption, stable recognition, and practical long-range RFID projects. According to M5Stack, the M5Stack UHF RFID Unit can reach an effective range of more than 1.5m with 100mW transmission power, and the listed detection range is up to 2m. The unit communicates through UART at 115200bps and includes a built-in AT command set, so the UHF RFID reader is plug-and-play for host controllers that need inventory, logistics, or smart retail tag monitoring. Video Demonstration Watch the official M5Stack MP4 video directly after the description to review the M5Stack UHF RFID Unit, JRD-4035 reader, and typical UART RFID workflow. Features M5Stack UHF RFID Unit: ultra-high frequency RFID read/write unit based on the JRD-4035 module solution. Built-in ceramic antenna: avoids the need for an additional external antenna in many embedded designs. UHF RFID reader: detection range up to 2m, with effective range over 1.5m at 100mW transmission power. Wide frequency coverage: operating frequency range from 840 to 960MHz. Protocol support: EPCglobal UHF Class 1 Gen 2 and ISO/IEC 18000-6C air interface protocols. UART interface: serial communication with 115200bps baud rate and built-in AT command set. Multi-tag workflow: tag buffer capacity up to 200 tags for monitoring and reading multiple product tags. Stable recognition: the JRD-4035 RFID Unit is designed for sensitive and stable tag recognition. Specifications Product Name UHF RFID Unit (JRD-4035) Air Interface Protocol EPCglobal UHF Class 1 Gen 2, ISO/IEC 18000-6C Supported Regions United States, Canada and other FCC regions; Europe and other ETSI EN 302 208 regions; Mainland China, Taiwan, Japan, Korea, Malaysia Operating Frequency Range 840 ~ 960MHz Output Power Range 18 ~ 26dBm Detection Range Up to 2m Tag Buffer 200 tags Communication Protocol UART, baud rate 115200bps Antenna Built-in ceramic antenna Shell Material Plastic (PC) Product Size 56.0 x 48.0 x 11.5mm Product Weight 41.0g Package Size 88.0 x 61.0 x 21.0mm Gross Weight 58.8g Applications Warehouse logistics: use the M5Stack UHF RFID Unit for pallet management and product tag reading. Vehicle management: build UHF RFID identification workflows around the UHF RFID reader. Smart retail: monitor and read multiple product tags with the JRD-4035 RFID Unit. Asset tracking: connect the UART interface to an M5Stack host for tag inventory and status checks. Prototype validation: use the M5Stack UHF RFID Unit to test UHF tag range, antenna placement, and read stability. Product List 1 Unit RFID-UHF 1 HY2.0-4P Grove Cable, 20cm 1 RFID Tag, 840 ~ 960MHz Other Content Reading Distance Note M5Stack notes that if the actual reading distance does not reach the nominal 1.5m to 2m range, users should check two points: transmission power should be set to the maximum value, and the software frequency should not deviate significantly from the device antenna frequency of 922MHz. This helps the JRD-4035 RFID Unit maintain the expected reading distance. For test benches and small deployments, the UHF RFID reader can be validated with the included RFID tag before moving to a larger tag set. The JRD-4035 RFID Unit is also useful when a project needs UART control, AT commands, and repeatable UHF tag reading in one compact module. The UHF RFID reader and JRD-4035 RFID Unit pairing keeps the hardware setup straightforward. Schematic Reference The official schematic helps developers review the UART connection and power pins before integrating the M5Stack UHF RFID Unit into a controller or embedded workflow. Resources Official M5Stack product documentation Official Unit RFID-UHF protocol PDF UIFlow MicroPython UHF RFID documentation M5Unit-UHF-RFID GitHub repository Official EasyLoader program FAQ What is the M5Stack UHF RFID Unit used for? The M5Stack UHF RFID Unit is used for UHF RFID tag reading and writing in warehouse logistics, vehicle management, smart retail, and asset tracking. Which module solution does it use? The unit adopts the JRD-4035 module solution with a built-in ceramic antenna. What is the reading range? M5Stack lists detection range up to 2m, with effective range over 1.5m using 100mW transmission power. Which interface does the UHF RFID reader use? The UHF RFID reader uses UART communication at 115200bps and includes a built-in AT command set. How many tags can the buffer hold? The tag buffer capacity is up to 200 tags. Is there an official video? Yes. The official M5Stack MP4 video is embedded directly after the description for this JRD-4035 RFID Unit.
